An interesting and innovate freight trial took place during the summer of 1997, conveying an intermodal milk tanker from Penrith to Carlisle. As can be guessed from this meagre load, the trial was not successful. With appropriate 'Milkliner' headboard, 20305 & 20301 pass through Radlett on 12 July 1997 with the 6Z58 12:53 Penrith to Cricklewood.